Organotrisulfide: A High Capacity Cathode Material for Rechargeable Lithium Batteries. Issue 34 (13th July 2016)

• Record Type: Journal Article
• Authors: Wu, Min; Cui, Yi; Bhargav, Amruth; Losovyj, Yaroslav; Siegel, Amanda; Agarwal, Mangilal; Ma, Ying; Fu, Yongzhu
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 34(2016)
• Page Start: 10027
• Page End: 10031
• Publication Date: 2016-07-13
• Subjects: cathode materials -- dimethyl trisulfide -- organotrisulfides -- rechargeable lithium batteries -- redox reactions; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201603897
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: An organotrisulfide (RSSSR, R is an organic group) has three sulfur atoms which could be involved in multi‐electron reduction reactions; therefore it is a promising electrode material for batteries. Herein, we use dimethyl trisulfide (DMTS) as a model compound to study its redox reactions in rechargeable lithium batteries. With the aid of XRD, XPS, and GC‐MS analysis, we confirm DMTS could undergo almost a 4 e − reduction process in a complete discharge to 1.0 V. The discharge products are primarily LiSCH3 and Li2 S. The lithium cell with DMTS catholyte delivers an initial specific capacity of 720 mAh g −1 DMTS and retains 82 % of the capacity over 50 cycles at C/10 rate. When the electrolyte/DMTS ratio is 3:1 mL g −1, the reversible specific energy for the cell including electrolyte can be 229 Wh kg −1 . This study shows organotrisulfide is a promising high‐capacity cathode material for high‐energy rechargeable lithium batteries. Abstract : SSSsuitable for batteries : Dimethyl trisulfide (DMTS) was used as a model compound to demonstrate that organotrisulfide compounds can be high capacity cathode materials undergoing multi‐electron redox reactions for rechargeable lithium batteries. The lithium/DMTS cell has a high specific energy density of 229 Wh kg −1 as a result of low electrolyte/DMTS ratios.